A likely incomplete list of non-original parts used:
Exhaust system-used crossover header and Campbell's peashooters
+.060 pistons due to major cylinder damage from being frozen tight
1 intake valve that was open and laying in the water on top the pistons
All gaskets, seals and rubber parts (exc, fork seals which are up next)
Fuel tank and paint
Tires (of course)
Headlight bucket and bulb from my '71
Gauge bulbs and running light and signal bulbs
One signal bezel and stalk
Stainless side and centerstand hardware-original-type parts could be sourced
Clutch plates, which were a mix of bronze and fiber, so not original in any case
Gearbox pawl spring
Petcocks and fuel lines
Rear signal lenses and taillight lens-repro items that could easily be replaced with original Lucas
Front fender stay bolts and nuts
All Lucas connectors
Various small rusty fasteners were replaced with leftovers from changing the '71 over to stainless stuff.
Ham can and filter, which were not with the bike when I got it.
Battery and hold-down straps
Drive chain
Half the spoke nipples on one side of the front wheel
M/C and carb overhaul kits
Mk III carb bodies
Rear brake cable
One footrest stud (Involved in an offloading incident)
Still need a good pair of mirrors- the one that came with the bike is legal but useless.